08/14 Pluton’s Fingers: Dikes and Siskiyou Geology

Instructor: John Roth
Date: Sunday August 14, 9 AM-5:30 PM*
Location: SFI/Oregon Caves National Monument
Tuition: $70

*end time may vary slightly, please plan accordingly


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What’s to like are dikes! Dikes are flattish bodies of rock that have cut through other rocks, vast molten blobs whose low density keeps us above sea level. Their magmatic fluids contributed to the formation of the earliest life, yet also helped kill most life billions of years later. Join us on serpentine road cuts, the Big Tree and Bigelow Lakes Trails , to see subalpine wildflowers, geobotany, and lava flows that have burst apart, remelted, and then been polished by a now vanished glacier.

Field day is moderate (1-3 miles of hiking and/or climbs of up to 500 ft).

Ages 12+ welcome.